package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dao.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
public class DishController {
        @Autowired
        private DishService dishService;

        @Autowired
        private DishFlavorService dishFlavorService;

        @Autowired
        private CategoryService categoryService;

        @Autowired
        RedisTemplate redisTemplate;



        /**
         * 新增菜品
         * @param dishDto
         * @return
         */
        @PostMapping
        public R<String> save(@RequestBody DishDto dishDto){


                dishService.saveWithFlavor(dishDto);

                return R.success("新增菜品成功");
        }
        /**
         * 菜品信息分页查询
         * @param page
         * @param pageSize
         * @param name
         * @return
         */
        @GetMapping("/page")
        public R<Page> page(int page,int pageSize,String name){
                //构造分页构造器对象
                Page<Dish> pageInfo = new Page<>(page,pageSize);
                Page<DishDto> dishDtoPage = new Page<>();

                //条件构造器
                LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
                //添加过滤条件
                queryWrapper.like(name != null,Dish::getName,name);
                //添加排序条件
                queryWrapper.orderByDesc(Dish::getUpdateTime);

                //执行分页查询
                dishService.page(pageInfo,queryWrapper);

                //对象拷贝
                BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
                List<Dish> records = pageInfo.getRecords();
                List<DishDto> list = records.stream().map((item) -> {

                        DishDto dishDto = new DishDto();
                        BeanUtils.copyProperties(item,dishDto);
                        Long categoryId = item.getCategoryId();//分类id
                        //根据id查询分类对象
                        Category category = categoryService.getById(categoryId);

                        if(category != null){
                                String categoryName = category.getName();
                                dishDto.setCategoryName(categoryName);
                        }
                        return dishDto;
                }).collect(Collectors.toList());
                dishDtoPage.setRecords(list);

                return R.success(dishDtoPage);
        }

        /**
         * 删除
         * @param ids
         * @return
         */
        @DeleteMapping
        public R<String> delete(@RequestParam List<Long> ids){
                dishService.removeByIds(ids);
                return R.success("删除成功");
        }

        /**
         * 根据id查询菜品信息和对应的口味信息
         * @param id
         * @return
         */
        @GetMapping("/{id}")
        public R<DishDto>get(@PathVariable Long id){
                DishDto dishDto = dishService.getByIdWithFlavor(id);
                return R.success(dishDto);
        }

        /**
         * 修改菜品
         * @param dishDto
         * @return
         */
        @PutMapping
        public R<String> update(@RequestBody DishDto dishDto){

                dishService.updateWithFlavor(dishDto);
                return R.success("修改菜品成功");
        }

        /**
         * 批量停售
         * @param
         * @return
         */

        @PostMapping("/status/{status}")
        public R<String> updateStatus(@PathVariable Integer status, Long[] ids){
                // 通过id查询数据库。修改id为ids数组中的数据的菜品状态status为前端页面提交的status。
//                for (Long id : ids) {
//                        //根据id得到每个dish菜品。
//                        Dish dish = dishService.getById(id);
//                        dish.setStatus(status);
//                        dishService.updateById(dish);
//                }
//

                LambdaUpdateWrapper<Dish> wrapper = new LambdaUpdateWrapper<>();
                wrapper.in(Dish::getId,ids).set(Dish::getStatus,status);
                dishService.update(wrapper);
                return R.success("修改成功");

        }

        @GetMapping("/list")
        public R<List<DishDto>>list(Dish dish){
                List<DishDto> dishDtoList = null;
                                //动态构造key
                String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
                                //先从redis中获取缓存数据
                dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
                if(dishDtoList != null){

                        //如果存在，直接返回，无需查询数据库
                        return R.success(dishDtoList);
                }

                LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
                queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
                queryWrapper.eq(dish.getStatus()!=null,Dish::getStatus,dish.getStatus());
                ArrayList<DishDto> dishDtos = new ArrayList<>();

                List<Dish> list = dishService.list(queryWrapper);
                list.forEach(dish1 -> dishDtos.add(dishService.getByIdWithFlavor(dish1.getId())));
                //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
                redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
                return R.success(dishDtos);




        }


}
